Pen with abrasive portion



FIG. 1 is a perspective view of the pen with abrasive portion showing my new design;

FIG. 2 is a side view thereof, wherein the opposite side view is the same;

FIG. 3 is a side view taken 90 degrees from the side view shown in FIG. 2, wherein the opposite side view is the same;

FIG. 4 is an end view of the end of the pen distal to the writing end; and,

FIG. 5 is an end view illustrating the writing end of the pen. 

The ornamental design for a pen with abrasive portion, as shown and described. 